• Journal of Korean Library and Information Science Society
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• v.39 no.1
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• pp.195-217
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• 2008

Providing web-based information literacy is a new turning point in the library instruction. After 2005 many university libraries are adopted to web-based information literacy. However as a result of research found out that initial problems of introduction to web-based information literacy are shown such as the lack of interest and motivation causing factor, the simplicity of providing method and so on. In order to maximize the effectiveness of web-based information literacy, working out in the way how to use library, how to search, demand of information, information ethics are the factors which should be constructed in the overall content aspect of web-based information literacy. Also, understanding and analysis of the tendency of users through the provision of diversity, flexibility of IT technology is based on a secure, and the need to pursue a variety of media are the factors which should be needed the way how to provide.

• Journal of Korean Society of Forest Science
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• v.97 no.3
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• pp.255-265
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• 2008

This study is aiming at providing the useful information for successful implementation of the forest resource promotion policy through analyzing the impacting factors and their relationships on policy accomplishment and policy effectiveness in executing the forest resource promotion policy. Interview survey was conducted on the stake-holders such as government officers and civilians who have direct or indirect influences on the establishment and execution of the forest resource promotion policy. The forest resource promotion policy was heuristically analyzed by using the LISREL (Linear Structural RELations) Model. The policy accomplishments of forest resource promotion significantly showed the positive relations with the suitability of problem recognition, the suitability of policy decision-making and rationality of policy execution, while the degree of policy support and the policy accomplishments were having significant impacts upon the policy effectiveness. Since the path coefficients between the latent variables and observed variables and among the latent variables mostly showed the positive relations significantly, the forest resource promotion policy was evaluated very successful in terms of policy accomplishments and policy effectiveness.

• The Journal of the Acoustical Society of Korea
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• v.13 no.1E
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• pp.55-63
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• 1994

A decision-theretic concept is introduced to investigate whether targets of interest in array sensor systems are present at some steering direction or not. The solutions to this problem are described as a set of discrete numbers 0 or 1 corresponding to the direction under consideration. This coded number representation is transplanted in the optimisation technique based on the Hopfield neural network, which may provide an easy understanding of determining the direction of arrival (DOA) of sources. Difficulties encountered in using the conventional state schemes of Hopfield neural network models are addressed and their related issues are raised. To deal with them, an idea that a neuron that decreases more energy difference for its state change of 0 to 1can have higher priority in the order of state transition than others is introduced. This does not only lead to an new state update scheme but also opens a different story in comparison to previous work. To cast the perspectives of the proposed approach and illustrate its effectiveness in source direction finding in array sensor system. simulation results and related discussions are presented in this paper.

• The Journal of Society for e-Business Studies
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• v.12 no.3
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• pp.33-47
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• 2007

The requirements have been changed during development progresses, since it is impossible to define all of software requirements. These requirements change leads to mistakes because the developers cannot completely understand the software's structure and behavior, or they cannot discover all parts affected by a change. Requirement changes have to be managed and assessed to ensure that they are feasible, make economic sense and contribute to the business needs of the customer organization. We propose a feature-oriented requirements change management method to manage requirements change with value analysis and feature-oriented traceability links including intermediate catalysis using features. Our approach offers two contributions to the study of requirements change: (1) We define requirements change tree to make user requirements change request generalize by feature level. (2) We provide overall process such as change request normalization, change impact analysis, solution dealing with change request, change request implementation, change request evaluation. In addition, we especially present the results of a case study which is carried out in asset management portal system in details.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.103-103
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• 2011

오늘날 우리 사회는 물산업의 성장성을 높이 평가, 국내 물산업 육성이 경제발전을 위하여 중요하다고 말한다. 따라서 정부는 정부대로, 기업은 기업대로 시장의 육성 및 선점을 위하여 많은 노력을 경주하고 있다. 특히 최근에는 국내 물시장의 성장 한계성을 이유로 해외 물시장 진출의 중요성이 강조되고 있다. 하지만 우리사회는 정작 해외 시장 진출을 위해 무엇보다 중요한 부문인 시장에 대한 정보 탐색에는 노력이 미흡한 실정이다. 즉 해외 물시장 진출의 중요성을 강조하고는 있지만, 어느 시장을 목표시장으로 선정해야 하는지, 무엇이 우리의 강점인지, 무엇을 고객에게 줄 것인지 등에 대한 탐색이 미흡함에 따라, 해외 물시장 진출에 대한 속 시원한 해법을 제시하는 이는 많지 않다. 이에 본 논고는 물시장의 성장 가능성이 높을 것이라고 알려진 아시아 시장의 여러 국가 가운데 국내 시장에도 잘 알려져 있지 않은 말레이시아 시장을 중심으로 정부 정책, 시장 환경, 현지 기술력 등에 관하여 살펴보고, 이를 기초로 시장으로서의 기회와 위험, 그리고 국내 기업의 강점과 약점을 살펴보았다. 분석결과로서 기회와 위험, 강점과 약점을 약술하면 다음과 같다. 먼저 기회의 관점에서 말레이시아는 치수사업, 수도사업, 환경정화사업 등 물산업 인프라가 여전히 취약한 점에서 국내 물기업에게 시장으로서의 기회를 제공하고 있다. 둘째, 외국계 기업에 대한 정부의 규제, 부실한 수도 재정 및 낮은 요금 등은 외국계 기업에 게 있어 위험 요인이 된다. 셋째, 높은 기술력을 이용하여 성공적으로 물 인프라를 구축 운영함으로써 선진국 수준의 물안정성 및 안전성을 확보하고, 4대강살리기 사업과 같은 대규모 프로젝트를 통해 녹색성장 모델을 구축함은 국내 물기업의 큰 강점이다. 넷째, 국내 기업에 대한 현지 시장의 낮은 인지도는 약점 요인이 된다. 현지 이해 관계자의 말에 따르면 "한국계 기업은 보유하고 있는 기술력에 비해 '기업' 및 '보유기술'에 대한 홍보가 부족하다"라고 지적한다. 결과적으로 국내 물기업이 현지 시장에 성공적으로 진출하기 위해서는 무엇보다 국내 기업에 대한 그리고 국내 기술력에 대한 적극적인 홍보가 필요할 것이다.

• The KIPS Transactions:PartC
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• v.12C no.6 s.102
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• pp.855-864
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• 2005

In this paper, we propose an intrusion detection system(IDS) architecture which can detect and respond against the generation of abnormal traffic such as malicious code and Internet worms. We model the system, design and implement a simulator using OPNET Modeller, for the performance analysis on the response capacity of alert information in the proposed system. At first, we model the arrival process of alert information resulted from abnormal traffic. In order to model the situation in which alert information is intensively produced, we apply the IBP(Interrupted Bernoulli Process) which may represent well the burstiness of traffic. Then we perform the simulation in order to gain some quantitative understanding of the system for our performance parameters. Based on the results of the performance analysis, we analyze factors which may hinder in accelerating the speed of security node, and would like to present some methods to enhance performance.

• Journal of KIISE
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• v.45 no.3
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• pp.251-279
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• 2018

Users can experience cybersickness when interacting with virtual reality (VR). The symptoms of cybersickness are similar to those of motion sickness which include eye fatigue, disorientation, and nausea. Despite the longstanding interest of user's discomfort, inconsistent results have been drawn on the underlying mechanisms and solutions of cybersickness. In this study, we propose an integrated view of cybersickness connecting causes of the symptoms, human perception model, and measurements of cybersickness. Cybersickness-related factors of previous research are reorganized into content, hardware, and human factors as well as analyzed in terms of VR fidelity. Also, pros and cons that measure the degree of cybersickness are discussed.

• Journal of Korean Society for Geospatial Information Science
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• v.19 no.4
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• pp.153-159
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• 2011

Vegetative land cover is an important variable many Earth system process, general circulation and carbon exchange model requires vegetative cover as boundary layer necessary to run model. The purpose of this study is to detect and to understand land surface change. To monitor changes of East Asia vegetation, we used NDVI 10-day MVC data derived from SPOT VEGETATION during 12 years from 1999 to 2010. Finally, according to the land cover of classified class, we performed analysis for dynamic zone(positive change zone and negative change zone), static zone in 1999, 2010. Therefore, land covers corresponding to each class have appeared change by 2010. Land cover change was confirmed by analyzing data during 12 years which appeared vegetation change of surrounding the actual desert area to east.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.2
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• pp.314-319
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• 2001

In the present study, effects of $\beta$-alanine, a known taurine antagonist for its structural similarity, on the adaptive regulation and kinetic behavior of the taurine transporter were investigated in the HT-29, human colon carcinoma cell line. Pretreatment of the cell with $\beta$-alanine(10mM) for varying periods from 3 to 30 hrs significantly reduced the taurine uptake compared to the value for control cells. This decrease in the taurine transporter activity was dependent on the incubation time with $\beta$-alanine, and the maximal down-regulation of the transporter activity was observed in cells pretreated with $\beta$-alanine for 24 hrs (25% of the control value, p<0.01). The taurine transporter appears to bind exclusively with $\beta$-alanine in the HT-29 cells since the same concentration of $\alpha$-alanine added in the culture medium for 24 hrs did not influence the taurine uptake. Kinetic analyses of the taurine transporter activity was performed in the HT-29 cell line with varying taurine concentration (5~60$\mu$M) in the uptake medium. Active taurine uptake was significantly lower in $\beta$-alanine pretreated cells compared to the value for control cells in the range of taurine concentration used in the experiment (p<0.001). The cells pretreated with $\beta$-alanine showed a 50% lower maximal velocity (Vmax, 1.7$\pm$2.0 nmole.mg $protein^{-1}$.$30min^{-1}$), and a 99% higher Michaelis constant (Km, 40.3$\pm$7.6$\mu$M) than the control values (3.3$\pm$1.9 nmole.mg $protein^{-1}$.$30min^{-1}$, and 20.3$\pm$2.1$\mu$M, respectively). These results on kinetic data suggest that $\beta$-alanine induced down-regulation of the taurine transporter activity was associated with decreases in both maximal velocity and affinity of the transporter.

• Journal of the Korean Institute of Intelligent Systems
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• v.26 no.1
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• pp.64-69
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• 2016

In this paper, a marathon of a humanoid robot is introduced, and its strategy is proposed. In order to develop humanoid robots for the purpose of cooperation and symbiosis with humans, the technologies such as increasing operating time and stability or recognizing surrounding environment are more important. One proper research model for the technologies is a human's marathon. In this paper, we introduce the human's marathon, and propose the humanoid robot's marathon. The marathon event of HuroCup has the most similar game rules to the human's marathon. The humanoid robot developed with the proper operating time, stability and ability to recognize the surrounding environment performed the marathon in HuroCup. The robot recognizes a marathon track using a computer vision, and builds the strategies for the race competition. By analyzing the experimental results, the humanoid robot performed in a real competition.